- Allow par-spacing for single-operator 1+n-line layout
- Tweak when to flatten operators, i.e. when to allow a flat one-line-each
layout for the operator sequence "$ $ $ + +".
I assume this makes inlining impossible, but it enables
parallel compilation of all these modules. In my tests
this reduce wall clock time to 92%, and with more cores
the benefit should be higher.
Lennart Spitzner